Highly collectable specimens were found at site.
Miners dug deep to get to ore reserves.
Early explorers found vast caches of silver here.
Mining has declined with falling prices, increased regulation.
Bradshaw Mountains were fruitful for miners; today, area draws lots of visitors.
Forty-square mile district produced 1.3 million tons of zinc, lead, silver and gold.
Old Pueblo played a big part in early mining.
Inclines helped move ore downhill.
Morenci, Metcalf open pit mines continue to operate to this day.
The Clifton-Morenci district was Arizona’s first major copper-producing region.
Arizona's mining history marked by labor issues.
Asbestos mines were profitable before they were banned.
Challenges facing early Arizona lines included steep gradients.
The tracks of the "iron horse" spread into many parts of Arizona.
The Colorado Plateau is known for its abundance of radioactive minerals.
An area mine produced 800 million pounds of copper between 1882 and 1930.
Silver discoveries in the 1870s instigated mining in the Globe-Miami District.
The Silver Queen Ledge, near modern-day Superior including the Irene and Hub claims, was discovered in 1871 by prospectors in search of the nearby Silver King Mine.
Located three miles north of Superior in Pinal County, the Silver King Mine was once the richest silver mine in Arizona, producing high-grade silver along with smaller amounts of gold, copper, zinc and lead.
While prospecting along the Hassayampa River in October 1863, Henry Wickenburg and several associates discovered a gold-bearing quartz outcrop 500 feet long, 400 feet wide and 100 feet tall.